State Lenz's Law. A metallic rod held horizontally along east-west direction, is allowed to fall under gravity. Will there be an emf induced at its ends ? Justify your answer.

State Lenz's Law. A metallic rod held horizontally along east-west di

1.	State Lenz's Law. A metallic rod held horizontally along east-west direction, is allowed to fall under gravity. Will there be an emf induced at its ends ? Justify your answer.
Answer» Solution :Lenz.s law gives the direction of induced emf/current. According to it, the POLARITY of the induced emf is such that it tends to produce a current which OPPOSES the change in magnetic flux that produced it. If a metal rod of LENGTH l held horizontally in east-West direction is allowed to fall vertically DOWNWARD under gravity then an induced emf `varepsilon = B_(H) l v` is set up across its ends on account of HORIZONTAL component of earth.s magnetic field `.B_(H).` pointing in north-south direction and v is the instantaneous speed of rod. The emf is induced on account of motional emf.

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State Lenz's Law. A metallic rod held horizontally along east-west direction, is allowed to fall under gravity. Will there be an emf induced at its ends ? Justify your answer.

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